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Ecology: A n Introduction

Dive into the world of ecology, where organisms interact with their environment in the biosphere. Learn about ecosystems, populations, habitats, and niches. Discover the roles of biotic and abiotic factors, including competition and limiting factors. Understand energy transfer through food chains and pyramids.

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Ecology: A n Introduction

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  1. Ecology:An Introduction

  2. The study of the interactions that take place among organisms and their environment

  3. Biosphere • The part of Earth that supports life • Top portion of Earth's crust (lithosphere) • All the waters that cover Earth's surface (hydrosphere) • Atmosphere that surrounds Earth

  4. Ecosystem • All the organisms living in an area and the nonliving features of their environment • Biotic – living • Abiotic – nonliving

  5. Biotic • Biotic – living • Plants • Animals • Single celled organisms • Fungi

  6. Abiotic • Abiotic – nonliving • Water • Air • Soil • Temperature • Sunlight

  7. Parts of an Ecosystem

  8. Population • All the organisms in an ecosystem that belong to the same species (biotic)

  9. Community • All the populations in an ecosystem (biotic)

  10. http://www2.tpwd.state.tx.us/learning/texas_nature_trackers/black_tailed_prairie_dog/images/lg_black_tailed_prairie_dogs.jpghttp://www2.tpwd.state.tx.us/learning/texas_nature_trackers/black_tailed_prairie_dog/images/lg_black_tailed_prairie_dogs.jpg

  11. Habitat • The place in which an organism lives • provides the kinds of food and shelter, the temperature, and the amount of moisture the organism needs to survive

  12. Niche • The specific role that an organism plays in its ecosystem

  13. http://www.thinksimian.com/images/birds_2/nest.JPG

  14. Competition • Food • Space • Mates • Water

  15. Competition • Competition caused by population growth affects many organisms, including humans • Limits population size

  16. Limiting Factor • Anything that restricts the number of individuals in a population. • Includes living / biotic and nonliving / abiotic features of the ecosystem

  17. Carrying Capacity • The maximum number of individuals of any species that can be supported by a particular ecosystem on a long-term basis

  18. http://library.thinkquest.org/J002558F/carrying_capacity.JPG

  19. Energy Transfer • Food Chains • Food Webs • Energy Pyramids

  20. http://www.arcytech.org/java/population/images/food_chain.jpghttp://www.arcytech.org/java/population/images/food_chain.jpg

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